adobe/brackets — pull request #10236 by MarcelGerber (2014-12-19 15:33:56+00:00)
Title: Don't throw an exception if currentTheme is undefined

Steps to repro the issue:
1. Reload Brackets without extensions
2. Take a look at the console

Result:
At least one error saying: `Exception in 'activeEditorChange' listener on Object TypeError: Cannot read property 'addModeClass' of undefined TypeError: Cannot read property 'addModeClass' of undefined`